Option A
Opposite angles in a cyclic quadrilateral add up to 180°
So
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x and 133 are opposite angles
Part A is done after part B
Answer:A
Step-by-step explanation:trust me brother
Answer: C— 9 m
Steps:
a^2 + b^2 = c^2
12^2 + b^2 = 15^2
144 + b^2 = 225
b^2 = 81
b = 9